public void addCustomerData() {
    	boolean validInput = false;
    	String first_name = "";
    	String last_name = "";
    	String address1 = "";
    	String address2 = "";
    	int zone_ID = 0;

    	while (!validInput) {
           	if(input.hasNext()){
           			first_name = input.nextLine();
           			validInput = true;
           	}
    	}
    	validInput = false;
    	while (!validInput) {
        	if(input.hasNext()){
        			last_name = input.nextLine();
        			validInput = true;
        	}
    	}
    	validInput = false;
    	while (!validInput) {
        	if(input.hasNext()){
        			address1 = input.nextLine();
        			validInput = true;
        	}
    	}
    	validInput = false;
    	while (!validInput) {
        	if(input.hasNext()){
        			address2 = input.nextLine();
        			validInput = true;
        }
        validInput = false;
        while (!validInput) {
            if(input.hasNext()){
            	zone_ID = input.nextInt();
            		validInput = true;
            }
        }
	}
    	customer.setFirstName(first_name);
    	customer.setLastName(last_name);
    	customer.setAddress1(address1);
    	customer.setAddress2(address2);
    	customer.setZone_ID(zone_ID);

    	// Assuming all fields are valid
    	controller.addCustomerData(customer);
    }